SYNOPSIS

DESCRIPTION

ccdconfig is used to dynamically configure and unconfigure concatenated
disk devices, or ccds. For more information about the ccd, see ccd(4).
The options are as follows:
-c Configure a ccd. This is the default behavior of ccdconfig.
-C Configure all ccd devices listed in the ccd configuration file.
-fconfig_file
When configuring or unconfiguring all devices, read the file
config_file instead of the default /etc/ccd.conf.
-g Dump the current ccd configuration in a format suitable for use
as the ccd configuration file. If no arguments are specified,
every configured ccd is dumped. Otherwise, the configuration of
each listed ccd is dumped. Only root can dump the configuration
(unless ccdconfig is made setgid kmem).
-Mcore
Extract values associated with the name list from core instead of
the default /dev/mem.
-Nsystem
Extract the name list from system instead of the running kernel.
-u Unconfigure a ccd.
-U Unconfigure all ccd devices listed in the ccd configuration file.
-v Causes ccdconfig to be verbose.
A ccd is described on the command line and in the ccd configuration file
by the name of the ccd, the interleave factor, the ccd configuration
flags, and a list of one or more devices. The flags may be represented as
a decimal number, a hexadecimal number, a comma-separated list of
strings, or the word "none". The flags are as follows:
CCDF_SWAP 0x01 Interleave should be dmmax.
CCDF_UNIFORM 0x02 Use uniform interleave.
CCDF_MIRROR 0x04 Enable data mirroring.
CCDF_OLD 0x08 Use old unoptimized I/O protocol.
The format in the configuration file appears exactly as if it were en-
tered on the command line. Note that on the command line and in the con-
figuration file, the flags argument is optional.
#
# /etc/ccd.conf
# Configuration file for concatenated disk devices
#
# ccd ileave flags component devices
ccd0 16 none /dev/sd2e /dev/sd3e